Add a (small) test-install suite?
At various times there has been discussion about whether testing should require
make install. Although I prefer to do testing using install (vs build), I see it as a choice, and not a requirement.
From time to time various issues have arisen that cannot be found with 'build' testing. Often, these issues cause CI test failure with master/trunk/ruby-head in external repos. Sometimes people blame 'Core', other times Travis, or rvm. Regardless, it doesn't look good.
So, might a small set of tests that check install functionality be added? It may need to be two separate (but equivalent) scripts. One for *nix, one for Windows.
In ruby-loco, I'm using a ps1 script to check that CLI bin files work. As soon as the update is pushed here, I'll add a test for nested bundler commands...